Door-lock.



nnrrnn snares Parana oration.

WILLIAM GERWIEN, OF SAN FRANCISCO, CALIFORNIA,

DOOR-LOCK.

Specification of Letters Patent.

Patented new. 7, rear.

Application filed December 20, 1910. Seria.1 No. 598,273.

cation.

My invention relates to improvements in door-locks, the primary objectof the invention being to provide a generally improved lock of thisclass of exceedingly simple, cheap, and eiiicient construction betteradapted to its intended purposesthan any other device of the same classwith which I am acquainted.

The invention relates more particularly to improved key controllingmeans for actuating the lock bolt as .well as normally holdingsaid boltin its projected and retracted positions.

A further object of the invention is to provide a generally improvedlock strike mechanism together with improved knob actuated latchingmechanism. adapted to cooperate with the improved lock strike mechanism.

With the above and other objects in View,

the invention consists in the novel construction, arrangement andcombination of parts hereinafter described, illustrated in one of itsembodiments in the accompanying drawings, and particularly pointed outin the appended claims.

Referring to the drawings, forming a part- .of this specification,Figure 1, is a perspective view of the improved lock applied to a door.Fig. 2, a sideelevation of the improved lock detached, the parts beingshown in-their normal. or retracted position with the removable sideplate of the lock casing I removed for the purpose of clearer illustraaperspective view of the improved key operated rotary member foractuating the slide lock bolt. Fig. 9, a perspective view of theimproved lock strike mechanism. Fig. 10,21.- cross sectional view of theimproved lock strike mechanism shown in Fig. 9. Fig. 11, a view of a keyfor cooperating with the key controlled means for cotiperating with andactuating the lock bolt. Fig. 12, a similar view of a key member foroperating the lock bolt fromthe inner side of the door.

Similar numerals of reference designate like parts throughout all thefigures of the drawings.

The improved door-lock comprises a lock casing 1.,and removable sideplate 2, referably mortised in the free side of a cor 3, as illustratedin Fig. 1, ofthe drawings. The casing edge plate 1, isprovided with astationary latch bolt or projectiont, preferably formed integraltherewith or permanently attached thereto.

The improved lock strike comprises a strike plate 5, provided with alatch receiving recess 6, adapted to receive and contain the stationarylatch bolt or projection' i, and the usual bolt receiving opening 7below as shown most clearly in Fig. 9 of the draw- The strike plate 5,is provided with a casing inset from the recess 6, said casingcomprisingupper and lower. lug members or walls 8. extending orprojecting on the latch receiving side of'the strike plate, said lugmembers or upper and lower members 8, being preferably provided at theirrear with the plate or wall 8; The face sides of the lug members-8,preferably extend outwardly at an angle to the face side of the strikeplate and are provided at their outer ends with a pivotally mountedspring resisted strike latch 9, pivoted between the lugs or on the openor face side of the casing, said strike latch having its free end 9,disposed within or at the receiving side of the latch receiving recess,a spring 10.-being interposed between the rear wall 8 and'the free endof the strike latch as shown most clearly in Fig. 10 of the drawings.

When the door is closed the stationary latch member or projection 4:, isreceived on the face side of the strike latch whereby the latter isdepressed against the resistance of the spring 10, and when the door ismoved to its closedposition the free end tit I 30 therethrough and theusual door knob 16.

sliding latchmember or bolt 11, is slidably mounted in the lock casing,said. slide-latch 'bolt or strike lock disengaging member 11,

having its outer end 11, disposed in close proximity to the latch boltor projection 4, so that when the latch member is projected itwill'comeinto engagement with the free end 9*, of the strike latch and move thelatter away from in front of or in engagement with the latch projection4, whereby to clear thelatterwhen the door is opened.

As a means for operating the sliding member or bolt 11, a spindle hub12,. is mounted in suitable bearings in the casing, said spindle hubbeing provided with a hub proje'c tion or lug 12, taking into engagementwith r a recess 12*, at the rear of thesliding bolt or member 11, andbeing adapted to project the latter against the resistance of a spring13, carried upon a'gu'ide arm'14, said guide arm being carried by themember. 11, and passing through a guide opening in a guide lug 15. Thespindle hub 12, is operated by the usual angular knob spindle passing Asa means for locking the sliding latch member 11, in its retractedposition from the inner side of the doorso that the latch cannot bereleased by turning theknob on the outer side of the door, a spindle hubi 17, is mounted in the casing, said spindle hub being provided with anintegral pawl l7 adapted while the sliding member, 11, is in itsretracted position as shown in Fig. 2, to be thrown into engagement withthe shoulder portion 11", whereby the member 11,- is held or locked inits retracted position as shown. The spindle hub- 17, is adapted to berotated by means of an angular spindle member'extending through the lockcasing and through the face plate 18, on the inner side of the door andprovided with an operating knob 19. As a means for normally holding thepawl member 17, in the positions indicated a movable pin member 20, maybe loosely mounted in a suitable opening in the pawl 17?, said pinmember being provided with a pointed or conical ortion adapted to beresiliently pressed into and held in engagement with a pair of depressedor countersunk openings 20 in the adjacent casing wall, the pin 20having a shoulder portion 20, a coiled spring 20, surrounding the pin,being interposed between said shoulder portion 20 and the removableplate 2 of the lock casing and operating in an obvious manner.

' The locking bolt 21, isprovided with a pair of guide slots 21ontainingcross guide members 22 and 22*, adapted to guide and limitthe-movements of the locking bolt '21, in its projecting and retractingmovements. The key controlled means for actuating the locking bolt 21,as well as for normally locking or holding the latter in its projectedand retracted positions 'comprises a key operated rotary member 23,provided with a pinion 24, meshing with a rack portion 21", of thelocking bolt 21,.said rotary member 23, beingpreferably of disk form asshown with its outer periphery resting or hearing in a stationarybearing shell por tion 25, and provided at its center with a key shankreceiving opening 23*, and near its outer periphery with a guide slot23*, to receive a lug 26, on the bit 26, of the key 27, illustrated inFig. 11 of the drawings.

The key controlled means for normally holding or locking the bolt 21, inits projected and retracted positions comprises a plurality of pivotallymounted tumbler members 28, 28 and 28, said tumbler memers beingpivotally mounted atone end on the guide pin 22%, and normally helddownwardly at their free ends toward the key -operated rotary inember23, by means of individual springs 29, bearing against the stud member30, of the casing which receives'the screw 30, for fastening theremovable plate 2. Each tumbler member is provided at its free end withan opening comprising an intermediate guide slot 31, terminating at itsends in transversely extending enlarged portions 31*, said enlargedportions bemg 1 00 adapted to contain a guide lug 21,-0f the lockingbolt 21, when the latter is in its retracted or projected position, theintermediate lug or shoulder portion 28*, of the tumbler member 28,dropping in front .of 105 the guide lug 21, as shown in Fig. 2, of thedrawings, whereby the locking bolt 21, is locked or held in itsretracted position until operated upon by the key 27, as now de.scribed. V, '11

- When it is desired to. project--the"lock bolt 21, through themedium ofthe key controlled means,'the key 27 is inserted through the key hole32, of the casing the shank portion thereof entering into the opening23, and the lug 26 on the bit. 26, entering into the guide slot 23*, ofthe key operated'rotary member 23, and when the it is turned, the steps26, 26, and 26, will engage and elevate the tumbler members 28, 28', and28, respectively, whereby the guide slot portions 31, of said tumblermembers, will be brought substantially in alinement with each other justprior to the initial movement of the key operating rotary member as thelug 26, reaches the end of the guide. slot 23*, and thus permitting thelocking bolt 21, to 'be projected through the instrumentality'of thepinion 24, and rack.21 As the guide lug is moved to its extreme'p'rojected position the enlarged portion 81 of the tumbler members willdrop down over the lug 21, thus normally holding or locking the lockingbolt 21, in its projected position until retracted through the keycontrolled means as above described.

As a means for providing for the opera tion of the locking bolt 21, fromthe inner side of the door a key 33, such as shown in Fig. 12, may beprovided, said key being adapted to be passed through the key hole 31-,of the casing, said key having a bit 35, adapted to swing in a recess 21of the bolt and actuate the latter after the tumbler members areinitially acting upon by the steps 35*, of the bit, in a manner similarto the operation of the key 27,'above described. The key 33, maybesecured within the door by means of an operating knob 36,,extendingthrough the face plate 18, and retained by means of an adjustablespacing sleeve 37, and clamping'screw"38, said sleeve 37, and clampingscrew 38, being adjustable in accordance with the distance between thelock casing and the face plate 18. I

From the foregoing description, taken in connection with theaccompanying drawngs, the operation and advantages of my invention willbe readily understood. Having. thus described an embodimentof myinvention What I claim anddesire to secure by Letters Patent is,.

1. In a door-lock, a casing provided with a stationary latch-bolt,.astrike-plate pro vided with a latchreceiving recess and a pivotallymounted strike-latch adapted to receiveand engage said stationary latchbolt, "a sliding latch-bolt within said casing adapted to be projectedin front of said stationary latch bolt and to disengage 'saidstrike-latch from said stationary latch-bolt, I

and means for operating said sliding latchbolt. r

2. In a door-lock, a casing provided with a stationary latch projection,a' strike-plate provided with 'a recess adapted to receive and containsaid latch projection and a pivotally mounted strike-latch adapted toreceive and engage said latch projection, a sliding latch member adaptedto be projected in front of said latch projection and -within saidrecess whereby to disengage said strike-latch from the latter, and aknob spindleand-hub operatively connected to said sliding latch member.

In testimony whereof I have afiixed my 'signature in presence of twowitnesses.

WILLIAM GE'RWIE'N. Witnesses:

' JAMES F. JENSEN,

L. J. VV LGH.

Copies 0t this patent may be obtained for five cents each, by addressingthe Commissioner of Paten Washington, D. G.

